MathFind the value of x. The area of a rectangle = 105 The length is 2x+1 Width is x __________________________________ I tried solving it : Arec = l x w 105 = (2x+1)x 105 = 2x^2 + x 0= 2x^2 + x - 105 This is where I get stuck on...
November 4, 2011 by Lynn

CalculusThe cost (in dollars) of producing x units of a certain commodity is c(x)=5000+10x+0.05x^2 Find A=100 to x=105 so far i got y-y/x-x= C(105)-C(100)/105-105 i don't understand how it comes out to be 101.25/5 please help me
October 27, 2007 by THU

Basic MathIm so confused with these questions: which of the following numbers are composite? 0,1,15,19,23,31,49,55,59,87,91,97,103,105 A. 1,23,31,59,91 B. 15,49,55,87,91,105 c. 0,1,19,23,31,105
January 22, 2008 by Michelle

algebraI don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8
October 21, 2010 by Josh

algebraI don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8
October 21, 2010 by Josh

PhysicsThe boom of a crane is 20 m long and is inclined 20ᵒ from the horizontal. A bucket of cement with a mass of 3000 kg is suspended from the upper end of the boom. What is the torque acting on the point where the boom is attached to the crane? A. 5.5 x 105 Nm. B. 3.5 x 105 ...
November 13, 2012 by Tom

Pre-CalcCould someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
September 7, 2011 by Sheila

physicsA locomotive that has a mass of 6.4 x 105 kg is used to pull 2 railway cars. Railway car 1 has a mass of 5.0 x 105 kg, is attached to railway car to that has a mass of 3.6 x 105 kg by a locking mechanism. A railway engineer tests the mechanism and estimates that it can only ...
October 30, 2013 by Anthony

PhysicsIf your last electric bill for sept. was $105. If the average price is 6.5 cents per kw, how many kw did your household use in September? 1kw/.065 = x/$105 .065x=105 x=1615.38 kw is this correct? How many Joules is that? I know that 1W =1Joule/second 1kw=1000W so 1615.38kw /...
October 17, 2007 by Andrea

mathPlease check for me: Solve the questions below and identify them as experimental or theoretical. a. A baseball player reaches base 35% of the time. How many times can he expect to reach base in 850 at-bats? Theoretical – P(reaches base) = X/850 X/850 * .35 = 297.50 b. Jenna ...
July 17, 2013 by cici

Physics What is the frequency of the electromagnetic radiation from outer space that reaches the earth with a wavelength of 1 x 105 m, and a velocity of 1 x 105 m/s?
February 9, 2012 by Hannah

Math-- Please Check1 2/5 divided by 21 Which example is correct 7/5 * 1/21 = 7/105 = 1/15 or is it? 5/7 * 21/1 = 105/7 =15 You asked this question yesterday. The answer is still the same.
February 23, 2007 by Bobby

TrigUsing a double angle formula how would you find the exact value of this expression? Cos²105° - sin²105°
April 19, 2009 by Brian

physicsA 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 2.8 105 kg, its speed is 28.5 m/s, and the net braking force is 4.15 105 N.
September 18, 2011 by Anonymous

physicsA 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 3.8 105 kg, its speed is 25.9 m/s, and the net braking force is 4.27 105 N.
October 15, 2011 by helpplease

MathJerry earned $18,500 one year and then recieved a 10.5% raise. What is his new yearly salary? would this be the correct way to set this up and the correct answer? $18500*10.5=$20442.50 You got the correct answer, but didn't type the correct equation. Which tells me you did it ...
May 27, 2007 by Stephanie

MATH Find the volumes of the solids generated by revolving the region in the first quadrant bounded by the following about the given axes. x = y - y3, x = 1, y = 1 (b) Revolved about the y-axis ? Hi Shawn, 97/105 * pi ? :) We need to cut away the volume of the region you get by ...
February 9, 2007 by Shawn

math 1151. divide26/634=24r10 is this correct? 2. subtract. 104.567-78.658= 25.909 is this correct? 3.identify the rate, base and amount in the following statement. 30% of 350 =105 350x.3=105 rate=30% base=350 amount=105. is this correct? 4. what is 60% of 250? =150. is this correct? ...
September 6, 2009 by Lea

physicsAn electron of mass 9.11 10-31 kg has an initial speed of 2.85 105 m/s. It travels in a straight line, and its speed increases to 6.93 105 m/s in a distance of 5.50 cm. Assume its acceleration is constant.
September 17, 2012 by morgan

chemistryYou are traveling in a country that uses the metric system. Your child is sick and a nurse determines her temperature to be 40.8 ºC. What is this temperature in ºF? (1.8*40.8)+32=105.44 105 (answer with correct # of sig figs)
February 1, 2012 by kr

PhysicsA jogger's internal energy changes because he performs 6.80 105 J of work and gives off 4.9 105 J of heat. However, to cause the same change in his internal energy while walking, he must do 8.10 105 J of work. Determine the magnitude of the heat given off while walking. J
April 18, 2008 by Johnson

physicsIn a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. Determine the heat transferred between her body and surroundings during this event. ________ J
November 29, 2012 by amela

chemistryAn electron traveling at 4.3×105 m/s has an uncertainty in its velocity of 1.92×105 m/s. What is the uncertainty in its position?
March 30, 2012 by missy

PHysicsConsider a space habitat that consists of a rotating cylinder. If the variation in g between one's head and feet is to be less than 1/105 g, then compared to one's height, h, what should be the minimum radius of the space habitat? (in terms of h) The centripetal acceleration ...
November 20, 2006 by Stephen

mathUse the appropriate sum/difference formula to find the exact value of cos(105°). do we choose one, then make 1 side equal cos of 105°? I dont understand the question.
April 15, 2012 by Anonymous

PHYSICS DUE SOONIn a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. (a) Determine the heat transferred between her body and surroundings during this event. _____J
November 29, 2012 by Ame

physicsA 747 jetliner lands and begins to slow to a stop as it moves along the runway. The mass is 3.1 105 kg, its speed is 25.5 m/s, and the net braking force is 4.24 105 N.(a) What is its speed 7.45 s later?How far has it traveled in this time?
October 3, 2011 by john

math ben and glen are practicing short golf shots. they are aiming for a flag that is 110 yards away? they consider any shot between 105 and 115 yards to be accurate. here are their results in yards. ben: 110,130,88,105,108,110,118,100,120,103.and Glen: 95,105,108,110,106,110,108,...
January 6, 2012 by theresa